Operational Transresistance Amplifier-Based Multiphase Sinusoidal Oscillators

Multiphase sinusoidal oscillator circuits are presented which utilize Operational Transresistance Amplifier (OTRA) as the active element. The first circuit produces n odd-phase oscillations of equal amplitudes and equally spaced in phase. The second circuit is capable of producing n odd- or even- ph...

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Bibliographic Details
Published in:Journal of electrical and computer engineering 2011-01, Vol.2011 (2011), p.1-8
Main Authors: Pandey, Rajeshwari, Pandey, Neeta, Bothra, Mayank, Paul, Sajal K.
Format: Article
Language:English
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Summary:Multiphase sinusoidal oscillator circuits are presented which utilize Operational Transresistance Amplifier (OTRA) as the active element. The first circuit produces n odd-phase oscillations of equal amplitudes and equally spaced in phase. The second circuit is capable of producing n odd- or even- phase oscillations equally spaced in phase. An alternative approach is discussed in the third circuit, which utilizes a single-phase tunable oscillator circuit which is used to inject signals into a phase shifter circuits. An automatic gain control (AGC) circuit has been implemented for the second and third circuit. The circuits are simple to realize and have a low component count. PSPICE simulations have been given to verify the theoretical analysis. The experimental outcome corroborates the theoretical propositions and simulated results.
ISSN:2090-0147
2090-0155
DOI:10.1155/2011/586853